University of North Carolina at Wilmington, Marguerite Casey Foundation, The Kate B. Reynolds Charitable Trust, National Native American AIDS Prevention Center, North Carolina Pediatric Society, Epip, North Carolina Community AIDS Fund, North Carolina Indian Health Board, Various Non Profit Organizations

A system, apparatus, and method for transmitting data in a broadcast mode to multiple devices operating in a network. The invention enables the efficient utilization of bandwidth while providing a desired level of quality of service for the applications executing on the devices that utilize the broadcasted data. The invention utilizes a set of bandwidth constraints in combination with a set of heuristics and rules for the allocation and re-allocation of bandwidth among multiple applications in a manner that minimizes the impact on the quality of service metrics of importance to the affected applications when contention exists for the network resources. The present invention implements processes to cause the quality of service provided to each application to degrade smoothly, with certain priorities and guarantees being maintained. The present invention also provides event segmentation and reassembly functions for applications, and includes reliability mechanisms to increase the ability to provide data to client devices that have not been actively receiving for significant periods of time.

Applications in a broadcast environment distribute events in real-time to a large number of receivers within specified geographic locations while efficiently sharing bandwidth resources with other applications using the same broadcast network. Applications need not be aware of the other applications sharing the resources, nor of the methods, protocols, and other mechanisms used to actually broadcast the data over the broadcast medium. Server-side applications that serve data, send notifications, or distribute events to specific locations within the network use a broadcast location manager. Client applications that receive such data, notifications, or events use a client location filter to obtain events that are relevant based on the location of the device. The broadcast location manager and client location filter work together to reliably and efficiently transmit data, notifications, and events to specific locations over the broadcast network for all applications involved.

A method is provided for restricting or enhancing broadcast content access on a per-subscriber basis across a population of subscribers, all of whom have a valid content access key to such content, without necessitating changes to the current standard schemes and protocols for distributing content access keys and broadcasting the traffic keys associated with the broadcast data itself, and without trusting the application that processes the data. A method of handling a multimedia broadcast in a device comprises receiving broadcast content in a media stream encrypted using a traffic key, receiving the traffic key encrypted using a session key, and receiving broadcast attributes encrypted using the traffic key and the session key, wherein use of the media stream by the device is controlled using the broadcast attributes and using an access policy in the device.

A method and system provides the capability for multicast data traffic to flow with a unicast mechanism; that is, for some network entity to send a copy of the MC data session to a specific network address associated with the client. A method of transmitting data traffic comprises transmitting data using a multicast session to a plurality of destinations, determining that the multicast session to at least one of the destinations of the plurality of destinations should be switched to a unicast session to the at least one destination, and switching the multicast session to the at least one destination to a unicast session to the at least one destination.

A system and associated apparatus and methods for the distribution, selection and display of advertising content for devices operating in a network. The devices need not initiate a point-to-point communication with an ad server to provide the ability to filter received advertising content and enable the display of advertisements that are targeted to a device's user. The invention enables a service provider or network operator to control the policy used to specify the selection, timing, and display of an advertisement stored in a cache of a client device. A modification to the policy can be broadcast and implemented in real-time by the device. Advertisements stored in the cache may be filtered both by the service provider or network operator and by the device itself so as to provide the best selection of ads tailored to the user of the device. The device implements cache management processes to determine how best to maintain the advertisements of greatest relevance to the user of the device. The invention also provides mechanisms for the reporting of statistics that can be used for billing purposes and to better filter the selection of advertisements cached at each device.

Applications in a broadcast environment distribute events in real-time to a large number of receivers within specified geographic locations while efficiently sharing bandwidth resources with other applications using the same broadcast network. Applications need not be aware of the other applications sharing the resources, nor of the methods, protocols, and other mechanisms used to actually broadcast the data over the broadcast medium. Server-side applications that serve data, send notifications, or distribute events to specific locations within the network use a broadcast location manager. Client applications that receive such data, notifications, or events use a client location filter to obtain events that are relevant based on the location of the device. The broadcast location manager and client location filter work together to reliably and efficiently transmit data, notifications, and events to specific locations over the broadcast network for all applications involved.

A method and system for content recommendation make such recommendations possible, even if users are in different geographic locations, use different network service providers and different services, user different types of device, etc. A method for communicating a content recommendation comprises receiving a recommendation for content, the content recommendation originating from a first client device communicating using a first network and destined for a second client device communicating using a second network, determining access information for the second client device to access the content using the second network, and transmitting the determined access information.

A method and system by which a client device can gather ESG data from disparate sources and present them to a user in a unified manner via a single user interface provides improved usability of the ESG. A method for providing an electronic service guide comprises acquiring a plurality of electronic service guides, translating each of the plurality of electronic service guides that was not acquired in a specified representation to the specified representation, combining the plurality of electronic service guides in the specified representation to form a unified electronic service guide, and providing the unified electronic service guide for display.